C-HS interaction exhibits all the characteristics of conventional hydrogen bonds

Physical Chemistry Chemical Physics : PCCP
Sanat GhoshSanjay Wategaonkar

Abstract

This is a tale of a pair of a hydrogen bond donor and acceptor, namely the CH donor and sulphur acceptor, neither of which is a conventional hydrogen bond participant. Sulfur (S), being less electronegative (2.58) compared to its first row analogue oxygen (3.44), has not been considered as a potential HB acceptor for a long time. The C-HY (Y = HB acceptor) interaction has its own history of exhibiting omnidirectional shifts in the CH stretching frequency upon complex formation. Therefore, a systematic investigation of the C-HS interaction was the primary goal of the work presented here. Together with gas-phase vibrational spectroscopy and ab initio quantum chemical calculations, the nature and strength of the C-HS hydrogen bond (HB) have been investigated in the complexes of 1,2,4,5-tetracyanobenzene (TCNB) with various sulfur containing solvents. Despite the unconventional nature of both HB donor and HB acceptor (C-H and S, respectively), it was found that the C-HS hydrogen bond exhibits all the characteristics of the conventional hydrogen bond. The binding strength of the C-HS H-bond in these complexes was found to be comparable to that of the conventional hydrogen bonds. The unusual stabilities of these HBs have been mainly ...Continue Reading

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Citations

Dec 15, 2020·International Journal of Biological Macromolecules·Parsaoran SiahaanMuhamad Abdulkadir Martoprawiro
Jan 26, 2021·The Journal of Physical Chemistry Letters·Kamal K MishraAloke Das
Apr 4, 2021·International Journal of Molecular Sciences·Bianca StoeanLuiza Ioana Gaina
Nov 21, 2020·Inorganic Chemistry·Moushakhi GhoshShabana Khan
Nov 11, 2021·Organic & Biomolecular Chemistry·Rebecca O FullerGemma F Turner
Nov 23, 2021·Physical Chemistry Chemical Physics : PCCP·Xiantao MaQiuju Zhou
Dec 21, 2021·Acta Crystallographica. Section E, Crystallographic Communications·Hemant P YennawarLee J Silverberg
Feb 2, 2022·Chemical Society Reviews·Hazel A FargherMichael D Pluth

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